I was also having a hard time with shrimp for awhile. I was floating them in bags or containers and slowly acclimating them over 30 mins or so. They would die in under a day, sometimes in as little as a couple hours. Jeff out at J&L said to try just throwing them in. It worked. I think that with the lack of circulating water in the container and proximity to lighting they were getting over heated.
I'm not too convinced about the necessity of strict acclimation procedures. In the ocean it is not uncommon for currents of different salinities and temperatures to move into reefs without laying waste to all the inhabitants. Just a thought...
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